v1.1.1: Allow "unassigned" IP addresses to be optionally restricted

Includes:
#7. An IP address' integer calculation is included in the IP address check.
#8. The "unassigned" IP address ranges in the input .CSV can now optionally be restricted.

v1.1.0: Add IP check in admin and ensure that a radio button is selected

This release includes the coding changes required for BUGFIX #5 and CHANGE #6.

v1.0.2: BUGFIX Release

This version includes the bug fixes for:
#3 All IP Addresses are blocked
#4 Free downloads are incorrectly restricted

v1.0.1: BUGFIX release

This release corrects bugfixes #1 and #2.

v1.0.0a: Zen Cart Plugins version

Update the readme to reflect the Zen Cart forum support thread and remove the Creative Commons license.

v1.0.0: Initial release

This is the initial release of the plugin.